Deletion mapping by gametocidal genes in common wheat: position of speltoid suppression (Q) and β-amylase (β-Amy-A2) genes on chromosome 5A

Genome ◽  
1990 ◽  
Vol 33 (6) ◽  
pp. 850-853 ◽  
Author(s):  
H. Tsujimoto ◽  
K. Noda
Keyword(s):  
Triticum Aestivum ◽  
Common Wheat ◽  
Genetic Map ◽  
Proximal Region ◽  
Deletion Analysis ◽  
Aegilops Speltoides ◽  
Deletion Mapping ◽  
Chromosome 5A ◽  
Terminal Area ◽  
Map Distance

The genes for speltoid suppression (Q) and β-amylase (β-Amy-A2) in common wheat (Triticum aestivum) were mapped cytologically on the long arm of chromosome 5A by using four 5Aq deletion lines produced by the action of gametocidal genes of Aegilops speltoides. A line with 13% terminal deletion in the whole long arm lacked both β-Amy-A2 and Q, indicating that these genes are confined within the terminal area. According to the genetic map, four other genes distal to β-Amy-A2, B1 (awn suppression), Hn (hairy node), Vrn1 (vernalization), and Kr2 (crossability), must also exist in this 13% terminal area. The β-Amy-A2 gene is mapped at 20 centimorgans (cM) from the centromere, and map distance between β-Amy-A2 and Kr2 is estimated at 97.5 cM. A comparison of the cytological map drawn by the present deletion analysis with the genetic map based on the recombination values indicates that recombination is restricted to the proximal region of chromosome 5A.Key words: Triticum aestivum, gametocidal genes, cytological map, genetic map, deletion mapping.

Relationships between floret size and grain weight in aneuploid lines of homoeologous group-5 chromosomes of common wheat (Triticum aestivum L.) cv. Chinese Spring

1986 ◽  
Vol 28 (4) ◽  
pp. 497-501 ◽  
Author(s):  
Eitan Millet
Keyword(s):  
Triticum Aestivum ◽  
Common Wheat ◽  
Chinese Spring ◽  
Triticum Aestivum L ◽  
Grain Weight ◽  
Homoeologous Group ◽  
Floral Organs ◽  
Chromosome 5A ◽  
Group 5 ◽  
Volume Estimates

Various aneuploids of common wheat (Triticum aestivum L.) cv. Chinese Spring were used to study the dosage effect of group-5 chromosomes on spike morphology, size of floral organs, and grain weight. Reduced dosage resulted in smaller floral organs, smaller floret cavities, and lighter grains than in the euploid, while increased dosage had the opposite effects. Chromosome 5A was the most effective in inducing these changes, whereas in most cases 5B was the least effective. Based on the various lines studied, a high linear correlation was found between the weight of the basal grains in the central spikelets and the volume estimates of the florets in which they were developed. The different lines exhibited a considerable similarity between the size distribution of floral organs and the grain weight distribution in the main spike. Pleiotropic effects of genes located on group-5 chromosomes on size of floral organs and grain weight are suggested.Key words: Wheat, aneuploids, group-5 chromosomes.

Evidence for the multiplicity of alleles at Vrn1, the winter–spring habit locus in common wheat

1984 ◽  
Vol 26 (2) ◽  
pp. 191-193 ◽  
Author(s):  
D. W. A. Roberts ◽  
M. D. MacDonald
Keyword(s):  
Triticum Aestivum ◽  
Key Words ◽  
Common Wheat ◽  
Triticum Aestivum L ◽  
Substitution Lines ◽  
Chromosome 5A ◽  
The Common

Changes in the number of days to first emergence of the spike head with increasing duration of vernalization were examined in the common wheats (Triticum aestivum L.) 'Rescue,' 'Winalta,' 'Kharkov 22 MC,' and the disomic substitution lines of 'Winalta' and 'Kharkov 22 MC possessing the 5A chromosome from 'Rescue.' The data suggest the existence of three Vrn1 alleles in addition to the Vrn1 allele which occurs in 'Cadet.'Key words: vernalization, Triticum, Vrn alleles, chromosome 5A.

Effect of algae Ecklonia maxima extract (Kelpak SL) on yields of common wheat, durum wheat and spelt wheat

2019 ◽  
Vol 74 (1) ◽  
pp. 5-14
Author(s):  
GRZEGORZ SZUMIŁO ◽  
LESZEK RACHOŃ ◽  
BARBARA KROCHMAL-MARCZAK
Keyword(s):  
Triticum Aestivum ◽  
Durum Wheat ◽  
Common Wheat ◽  
Yield Components ◽  
Grain Quality ◽  
Foliar Application ◽  
Control Treatment ◽  
Favourable Effect ◽  
Ecklonia Maxima ◽  
Spelt Wheat

The 3-year experiment was concerned with the response of spring forms of common wheat (Triticum aestivum L. subsp. aestivum), durum wheat (Triticum durum Desf.) and spelt wheat (Triticum aestivum subsp. spelta L. em. Thell.) to the foliar application of a plant growth stimulant (extract from marine algae Ecklonia maxima), with the commercial name of Kelpak SL (GS), as compared to control treatment (C). The following parameters were analysed: yield of grain, yield components (number of ears, weight of 1000 kernels, number and weight of kernels per ear) and physical indicators of grain quality (test weight, uniformity and vitreosity of grain). The study showed that the level of yielding and the yield components were related primarily with the wheat genotype, but they depended also on the agro-climatic conditions and on the algae extract and control experimental treatments. The application of algae extract, compared to the control, caused a significant increase in the yields of the spring wheat species under study, on average by 7.0%. Canopy spraying with algae extract had a favourable effect on the number of ears, on he number and weight of kernels per ear, but it had no effect on the weight of 1000 kernels. The grain quality of durum wheat, spelt wheat and common wheat was affected more strongly by the weather conditions in the successive years of the study and by the genotype than by the foliar application of algae extract. The spelt genotypes were characterised by lower yields and lower grain quality than common wheat and the durum wheat genotypes.

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